I have two Solanum mammosum (nipplefruit) plants next to each other, and the one on the right is starting to wither since a week. The other one is not, what's going on here?
The plants are from seeds, and are in full ground since they were little. They are in the north-west corner of my garden (so facing south-east). They were both doing fine, until last week, the one on the right is having problems, the leafs are withering and browning and hanging. What can be the cause of this?
I live in Amsterdam, we had normal weather the past few weeks, however since last weekend the temperature is going tropical again (30 C or higher). But it started last week before the heat already.
NB. I have two more of these plants several meters to the right, which are doing fine. So it seems only one plant is having these issues.